body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #007bff;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

main {
    max-width: 600px;
    margin: 40px auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

button {
    background-color: #28a745;
    color: #fff;
    border: none;
    padding: 12px 25px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 25px;
    transition: background-color 0.3s, transform 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

button:hover {
    background-color: #218838;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.1);
}

button:disabled {
    background-color: #c3c3c3;
    cursor: not-allowed;
    box-shadow: none;
}

p {
    line-height: 1.6;
    font-size: 16px;
    margin-top: 20px;
}

#loadingContainer {
    width: 100%;
    background-color: #ddd;
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 20px;
}

#loadingBar {
    width: 0;
    height: 100%;
    background-color: #007bff;
    transition: width 0.3s;
}